Research gap at a glance
- Question: Can a gastric perception task with a physically specified stimulus and a known correct answer yield a reliable individual accuracy score, comparable to existing cardiac and respiratory tasks?
- Why it matters: Without one, the stomach cannot enter the domain-generality question as a third perceptual axis, and claims about gastric interoception rest on coupling or attention measures that have no correct answer. It is also the channel where autism, eating disorders and gut-brain disorders are thought to show their largest effects.
- Theme: Measurement
- Status: open
What the wiki already knows
- The gastric channel is where cross-modal coherence of interoceptive accuracy was originally claimed, in work that linked cardiac accuracy to gastric detection and to voluntary control of gastric motility (Gastric network).
- Serious attempts at a gastric detection task date to the 1980s; the decisive three-channel test of domain generality lacks a gastric axis for that reason (Is interoception domain-general or organ-specific?).
- Attending to the stomach produces a distinctive cortical profile, but the paradigm has no correct answer, so it yields a gastric signature and no gastric score (Haruki & Ogawa (2023), Interoceptive attention task).
- The reliable gastric measurement available, the Electrogastrography (EGG) signal, is physiology rather than perception, and gastric-brain coupling is not reliable in individuals (Levakov et al. (2023)).
- In autism, hunger, thirst and gastrointestinal discomfort are the cues where atypical interoception is argued to live, yet the physiological studies used heartbeat tasks only (Interoception in autism (ASD)).
What would answer it
- Build a gastric detection or discrimination task around a graded, physically controlled gastric stimulus scored with signal-detection or staircase methods, establish its test-retest reliability and its relation to Electrogastrography (EGG), then administer it with the Heart Rate Discrimination Task (HRDT) and Respiratory Resistance Sensitivity Task (RRST) in one sample to estimate cross-channel correlations.
Connections
- Raised on: Gastric network, Is interoception domain-general or organ-specific?, Haruki & Ogawa (2023), Interoception in autism (ASD)
- Related concepts: Gastric network, Interoceptive sensitivity, Disorders of brain-gut interaction, Interoceptive control
- Related debates: Is interoception domain-general or organ-specific?, Can brain–body coupling be measured in a person?
The wiki’s interoceptive accuracy evidence is almost entirely cardiac, with a recent respiratory supplement. The stomach appears often, but always through measures that are not perception scores: phase coupling between the stomach rhythm and the brain, a neural map evoked by attending to the stomach, or the stomach rhythm itself. The Gastric network page closes by asking whether a gastric analogue of interoceptive accuracy exists at all, and records that the question is largely a 1980s literature.
This matters most for Is interoception domain-general or organ-specific?. The current case against a general interoceptive ability rests on cardiac and respiratory decorrelation, and the debate page names gastric as the missing third axis, in part because it is where coherence was first claimed. Haruki and Ogawa (2023) narrowed the gap only in the neural currency: they found the stomach has its own attentional signature, which says nothing about how accurately anyone perceives it.
A task with a correct answer would also give clinical questions a target. Interoception in autism (ASD) argues the evolutionarily salient cues (hunger, thirst, gut discomfort) are where autistic interoception most likely differs, and Disorders of brain-gut interaction are characterised by high sensibility with altered processing, yet neither literature has a gastric accuracy measure to test those claims against.